PHOTO BY / FOR CHINA DAILY Oil floats on a river in Shaoxing, Zhejiang province, on Sunday. Residents said the oil spills were caused by small businesses that install and fix diesel engines on ships. At least 1,000 square meters of water was polluted. “double check”, which is similar to security checks at airports. It is expected to be implemented at all subway stations soon. Police said they received a tip on Thursday that a white truck was transporting smuggled goods into China. After police stopped the truck, the driver fled. an airport in Zhaotong to close. Meteorologists forecast snowfall to continue in seven cities or prefectures through Monday.